// The NSpring Framework for .NET
// Copyright (c) 2003, Jeffrey Varszegi
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, 
// are permitted provided that the following conditions are met:
// 
// - Redistributions of source code must retain the above copyright notice, this 
// list of conditions and the following disclaimer.
// 
// - Redistributions in binary form must reproduce the above copyright notice, this 
// list of conditions and the following disclaimer in the documentation and/or other 
// materials provided with the distribution.
// 
// - Neither the name of the NSpring project nor the names of its contributors may 
// be used to endorse or promote products derived from this software without 
// specific prior written permission from the copyright owner.
// 
// - No product derived from this software may be called "NSpring", nor may 
// "NSpring" appear in the name of such a product, without specific prior written 
// permission from the copyright owner.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
// IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
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// OF THE POSSIBILITY OF SUCH DAMAGE. 

namespace NSpring.Logging.Loggers {

using System;
using System.Diagnostics;

using NSpring.Logging.EventFormatters;

/// <summary>
/// A Logger implementation that writes messages to System.Diagnostics.Debug .
/// This lets code using the logging framework coexist with code using Debug,
/// and also offers performance benefits when in debug mode.
/// </summary>
public sealed class DebugLogger : Logger {
    private string defaultCategory = null;
    
    /// <summary>
    /// Creates a new instance, with buffering enabled by default and an
    /// auto-flush interval of 10 seconds; also sets Debug.AutoFlush to false
    /// </summary>
    public DebugLogger() {
        eventFormatter = new PatternEventFormatter("{message}");
        
        Debug.AutoFlush = false;
        
        IsBufferingEnabled = true;
        AutoFlushInterval = 10000;
    }
    
    /// <summary>
    /// Gets and sets the Debug category to be used for Event objects with a Category property of null.
    /// (The Event object's Category property always takes precedence.)
    /// </summary>
    public string DefaultCategory {
        get {
            return defaultCategory;
        }
        set {
            if (value != null) {
                value = value.Trim();
                if (value.Equals("")) {
                    value = null;
                }
                defaultCategory = value;
            }
            else {
                defaultCategory = null;
            }
        }
    }
    
    protected override void Write(Event _event) {
        if (_event.Category != null) {
            Debug.WriteLine(eventFormatter.Format(_event), _event.Category);
        }
        else if (defaultCategory != null) {
            Debug.WriteLine(eventFormatter.Format(_event), defaultCategory);
        }
        else {
            Debug.WriteLine(eventFormatter.Format(_event));
        }
        Debug.Flush();
    }

    protected override void Write(Event[] events, int length) {
        Event e;
        if (defaultCategory == null) {
            for(int x = 0; x < length; x++) {
                e = events[x];
                if (e.Category != null) {
                    Debug.WriteLine(eventFormatter.Format(e), e.Category);
                }
                else {
                    Debug.WriteLine(eventFormatter.Format(e));
                }
            }
        }
        else {
            for(int x = 0; x < length; x++) {
                e = events[x];
                if (e.Category != null) {
                    Debug.WriteLine(eventFormatter.Format(e), e.Category);
                }
                else {
                    Debug.WriteLine(eventFormatter.Format(e), defaultCategory);
                }
            }
        }
        Debug.Flush();
    }
}

}
